Prepare your development computer and ensure it meets the system requirements.

Install the SDK starter package from the table above. (If you’re on Windows, download the installer for help with the initial setup.)

Install the ADT Plugin for Eclipse (if you’ll be developing in Eclipse).

Add Android platforms and other components to your SDK.

To add or update the individual SDK components that you need, use the Android SDK and AVD Manager (included in the SDK Tools).

You can launch the Android SDK and AVD Manager in one of the following ways:

From within Eclipse, select Window > Android SDK and AVD Manager.

On Windows, double-click the SDK Manager.exe file at the root of the Android SDK directory.

On Mac or Linux, open a terminal and navigate to the tools/ directory in the Android SDK, then execute:

Note:The Android SDK and AVD Manager is the tool that you use to install and upgrade SDK components in your development environment.Let us know whether you are updating you platform or not.Feel free to ask any question any time!